Static electricity/astronomy updates
January 6, 2010
January is often a time for lots of updates from the world of astronomy, because it’s when the American Astronomical Society has their yearly conference/meeting. This year’s is a big one, with lots of news regarding exoplanets. Unofortunately, no Earth-twins have been found yet but there are some other interesting stories from Kepler and many other sources. Some highlights so far:
The Kepler mission has found its first batch of exoplanets, all of which are gas giants similar to Jupiter (though one is reportedly more like Neptune) orbiting very close to/quickly around their parent stars. It’ll be a few years before it finds anything else, because anything else takes a lot longer to orbit. Since Kepler is specifically looking for transiting planets (the planet passing directly between its parent star and us) it has to have 3-4 transits to be absolutely sure of its findings. Since planets like ours take a year or more to orbit… well, you do the math. It even found one gas giant that has the same approximate density as sytrofoam. (Via NASA and NewScientist)
Another interesting tidbit to come out this year is a much clearer picture of just how common solar systems like our own are in the universe/galaxy. According to astronomers from Ohio State University, who were heading up a larger collaborative effort called MicroFUN (micro-lensing follow-up network), about 10–15 percent of all stars have planet systems like ours (meaning a few gas giants orbiting far out, with probably a few small, rocky planets in closer). 10-15 percent may seem like a small number, but when you consider the overall vast number of stars just in our own galaxy alone, you’ll realize that even 10 percent equals hundreds of millions of solar systems. It should be quite obvious now that there are other worlds out there very similar to our own, we just haven’t found solid evidence of them yet, so we can’t be 100% sure. But I am confident the Kepler, the CoRoT mission, or maybe even a ground-based telescope, will find one within the next decade. (Via EurekAlert! and Space.com)
Here’s a little bit of everyday science for you:
We’ve all been annoyed when we get out of our cars or walk across a carpeted room in the winter time and shock the #&*$@! out of ourselves on the door/other metallic object. So why the hell does it always happen so much more in the winter? It has to do with the humidity. Especially in the eastern US, the winter months are much MUCH drier than the summer ones. (Remember that Relative Humidity is NOT a direct measurement of how much moisture is actually in the atmosphere, go by the dewpoint- the lower the dewpoint, the less moisture is in the air.) Colder air has less moisture capacity than does warmer air, thus the winter months are very dry. Well all know that static electricity is the buildup of an electric charge in our bodies and/or clothes due to simple friction. During the summer months when the air is more humid, the moisture in the air allows those charges to constantly dissipate because we all know water is a good conductor of electricity. The static electric charge never has a chance to build up because it’s constantly “seeping” away into the moist air. In the winter, the dry air does not conduct and “seep” away the static electric charge, allowing it to build up until we reach for something metallic such as a doorknob and POW! the electricity instantly discharges in one big spark and we get shocked.
Google UFO explained/Shuttle photos/EEstor
September 8, 2009
Whew. That was quite an eye-gasm wasn’t it? That was taken on the current space shuttle mission (STS-128) to the International Space Station. The mission is about to come to an end, with a scheduled landing on Thursday. (Via Universe Today)
I also found on UT the final explanation of the Google UFO logo that caused quite a stir yesterday all over the interwebz. The Google tech-nerds were simply showing some love for the Japanese video game Zero Wing, the one with the famous quote “All your base are belong to us” at the beginning. Google also tweeted a mysterious set of numbers. It turns out if you insert the corresponding letters of the alphabet, you get “All your O are belong to us.” No, Google doesn’t know something we don’t. No, it wasn’t a hint that we’ll soon be visited by aliens, or that the government will finally come clean on a huge conspiracy theory. Sorry, Fox Mulder.
Until this morning I’d never heard of EEStor, but this new technology could revolutionize…. everything. But apparently it’s been met with quite a bit of skepticism. Basically it’s a new way of storing electricity, much more efficient than a lithium ion battery, and it would make storage of power generated by wind turbines and solar cell arrays much easier. The problem with power from the wind and sun is that it isn’t constant, therefore you need a way to store that power so that it can be used at all times, even when it’s dark or there’s no wind. That storage has been a big hurdle for the progress of these types of energy. Basically what they’ve done is invent a capacitor capable of storing much more energy than any capacitor before. It was once thought that basic problems with the very laws of physics prevented the development of capacitors with this much storage potential. But apparently this company has managed to convince the Zenn motor company, along with several investors with deep pockets, that they have found a way around those problems. If they’re really on to something it could make 100% green, sustainable power much closer to reality. If you’re a total electronics nerd and want to read the nitty-gritty on this, check out this article. (Via EcoGeek)